Market Notices

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - QLD region - 13/05/2026

Refer AEMO Electricity Market Notice 144073

At 1341 hrs the T157 Ingham South No.1 and No.2 132/66kV Transformers were returned to service.

The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.

AEMO will not reclassify this event as a credible contingency event.

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - QLD region - 13/05/2026

At 1255 hrs the T157 Ingham South No.1 and No.2 132/66kV Transformers tripped.

AEMO did not instruct load shedding.

AEMO estimates approximately 6MW of electrical load has been disconnected.

The cause of this non credible contingency event is not known at this stage.


Manager NEM Real Time Operations

Change Number: CHG0110523

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Gas Hub
Change Title: Gas Retail Initiatives B2B Package 1 ? Production deployment of r46 schema update
Change Start Date & Time: 23/05/2026 08:00:00
Change End Date & Time: 25/05/2026 18:00:00
Outage Start Date & Time: 23/05/2026 10:00:00
Outage End Date & Time: 23/05/2026 20:00:00
Environment: Production

Participant Impact and Requirements: -There will be a co-ordinated outage where East coast gas participants will be deploying updated systems to move to Schema Version r46 per Gas Retail Initiatives B2B
Package 1.
The Western Australian Gas Retail Market will remain on aseXML schema version 40 and is excluded from Package 1.

This change document ("Cutover Plan") has previously been communicated to all participants via the GRCF and ITWG forums. Please refer to the approved cutover plan for more details on the outage period and the (optional) PVT activities as part of this deployment activity.

https://www.aemo.com.au/-/media/files/initiatives/gas-retail-initiatives-b2b-package-1/gas-retail-initiatives-b2b-package-1-may-2026-cutover-plan-v10.pdf?rev=dbeb803b74944c87ab6846cc13eed820&sc_lang=en

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.

Change Number: CHG0110288

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 56.2 BAU and PMS Release

Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.

The MTPASA results published on 12 May 2026 identifies no Low Reserve Conditions.

MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any AEMO intervention.

For further information on MT PASA, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy.

For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/nem-forecasting-and-planning/forecasting-and-reliability/reliability-standard-implementation-guidelines.

This notice supersedes Market Notice 144034 published on 5 May 2026.

Forecasting

AEMO

AEMO ELECTRICITY MARKET NOTICE

A network augmentation has been commissioned in the NSW Region.

At 1740 hrs the following equipment was commissioned.

Wagga - Dinawan 6L 330 kV Line
Wagga - Dinawan 6J 330 kV Line
Dinawan 330 kV A and B Buses

Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.

Region: QLD1

Lines: Kamerunga - Barron Gorge 7184 132kV and Kamerunga - Barron Gorge 7143 132kV

Cancellation time: 09/05/2026 03:24

Constraint set(s) revoked:
NONE

Refer AEMO Electricity Market Notice 144067

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

Region: QLD1

Lines: Kamerunga - Barron Gorge 7184 132kV and Kamerunga - Barron Gorge 7143 132kV

Duration: 09/05/2026 02:20 until further notice

Constraint set(s) invoked:
NONE

Auto-generated on behalf of Manager NEM Real Time Operations

AEMO ELECTRICITY MARKET NOTICE

NON-CONFORMANCE NSW1 Region Friday, 8 May 2026

AEMO has declared the following unit as non-conforming under clause 3.8.23 of the National Electricity Rules:

Unit: WTAHB1
Duration: 08/05/2026 13:15 to 08/05/2026 13:20
Amount: 18 MW
Constraint: NC-N_WTAHB1

Auto-generated on behalf of Manager NEM Real Time Operations